analysis of the power supply to improve coal mine safety and reliability analysis of composite measures（分析提高煤矿供电的安全性和可靠性分析的综合措施）.docVIP

Analysis of the power supply to improve coal mine safety and reliability analysis of composite measures Paper Keywords: underground coal mining safety of low voltage power supply system Abstract: After analyzing the status of coal mine after a low-voltage power supply system, to improve coal mine safety and reliability of technical measures to supply a detailed analysis of talk. As we all know, most of China’s coal resources exploitation in the underground for their special space exploration, coal seam structure makes the coal mine environment is very harsh. Mining area contains a lot of the surrounding gas, coal dust and other flammable, explosive substances, if the electricity properly, very easy to leakage of electrical equipment such as occurrence of spark discharges a gas underground, coal dust explosions and other serious accidents. This will combine my work experience, commonly used on projects to improve coal mine safety and reliability of power supply system and the specific measures measures summarized in order to provide for other related projects that reference [1]. 1 Analysis of coal mine power system Power supply system used in coal mine explosion-proof electrical equipment and increased safety in low voltage power supply system has greatly improved the level of security, but because most of the coal mine power system there is uneven distribution of load, harmonic pollution , device model does not match the other issues, to the safe use of electricity underground buried a number of security risks. Main transformer capacity of less than 1.1 Underground power system load capacity is far greater than the original design capacity, resulting in long-running main transformer operating in inefficient working conditions, not only reduces the power system reliability and power quality levels, while long-running system in the past load conditions, can easily lead to transformer overheating, insulation aging, power supply cables bur